第20课

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摘要: .

Unit 5第五单元

Exploring the Universe探索宇宙

Whenever a clear night comes, the stars fill the boundless sky, and the starry night sky always arouses our infinite reverie Let's go into the vast universe and feel its magic and magnificence!每当晴朗的夜晚来临,点点繁星布满无边无际的天穹,星光灿烂的夜空,总会引起我们的无限遐思让我们一同走进这浩瀚的宇宙,感受它那份神奇与博大吧!

2 0 The Sun Family2 0 太阳家族

Collect information about the members of the solar family, the galaxy and the infinite universe, the development of telescopes and cosmic exploration, and the development of space technology in China and the world. 搜集资料,了解太阳家族中的成员,银河系和无限的宇宙、望远镜与宇宙探索的发展、我国及世界航天科技的发展历程等。

Prepare: various colors of play dough, cardboard, wire, round gauge, colored pencils, etc.

准备：各色橡皮泥、纸板、铁丝、圆规、彩笔等。

Tell us what we know about the sun family说一说我们知道的太阳家族

Earth one of them.地球其中的一员。

There are comets有彗星

There is the Moon which orbits the Earth有围绕地球运转的月球

Diagram of the solar system太阳系示意图

A star is a star that shines and emits heat on its own.恒星是自己能发光、发热的星体。

The Sun is a star.太阳是一颗恒星。

The solar system consists of the Sun, planets orbiting the Sun, dwarf planets, small bodies (comets, asteroids, meteoroids, interstellar matter), and moons orbiting the planets.太阳系由太阳、围绕太阳运转的行星、矮行星、小天体(彗星、小行星、流星体、星际物质)及围绕行星运转的卫星组成。

Study of the solar family研究太阳家族

Is the Sun the only one in our solar system that shines?太阳系中只有太阳会发光吗?

Do all the planets have moons?是不是所有的行星都有卫星呢

Information cards资料卡

Definition of planets行星定义

At the 26th General Assembly of the International Astronomical Union (IAU) in Prague in August 2006, the resolution "Definition of Planets" was adopted.

2006年8月在布拉格召开的国际天文学联合会第26届大会上通过了《行星定义》决议。According to the Definition of Planets, in the solar system, a planet is defined as a planet if it meets the following three judgments:根据《行星定义》,在太阳系中,凡满足下列3个判断的定义为行星:

orbits the sun; 2. has a nearly spherical shape;3. has a clear orbit. Among the traditional nine planets of the solar system, only Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune meet these conditions.

1.绕日运行;2.近球形状;3.轨道清空在太阳系传统的九大行星中,只有水星、金星、地球、火星、木星、土星、天王星和海王星符合这些条件。

Pluto has been demoted to a dwarf planet because it does not meet the new definition of a planet.冥王星由于不符合新的行星定义,被降级为矮行星。

Planets in the Solar System太阳系中的行星

Mercury is the closest to the Sun, often appearing at the same time as the Sun, and has a very thin atmosphere. The temperature of Mercury can reach 450°C during the day and -170°C at night.水星离太阳最近,常和太阳同时出没,有非常稀薄的大气。水星白天的温度可达450℃,夜间的温度能降至-170℃

Venus, also known as the star of revelation, is the brightest planet in the sky and the closest to the Earth.金星又称启明星,是天空中最亮、离地球最近的行星。

Venus has a thick atmosphere with a temperature of 400°C or more.金星有厚厚的大气层,温度达400℃以上。

It can often be seen at dawn or dusk.人们经常可以在黎明或黄昏时看到它。

Earth is our beautiful and rich home.地球是我们美丽而富饶的家园。

Mars is far from the sun, has thin air, and has a low surface temperature. 火星远离太阳,空气稀薄,表面温度较低。

It has a red appearance.它的外表是红色的。

Jupiter is the largest planet in our solar system and the second brightest of the planets in our solar system after Venus.木星是太阳系中最大的行星,也是太阳系行星中仅次于金星的第二大亮星,大红斑是它的重要标志。

Saturn not only has many moons, but also has a very beautiful halo.土星不仅有许多卫星,还有非常美丽的光环。

Uranus and Neptune are far away from the Sun and have very low temperatures, so they are called the solar planets.天王星、海王星距离太阳较远,温度很低,被称为日行星。

What else do you know about these planets?关于这些行星,你还知道些什么?

Build a model of the solar system建构太阳系模型

We can use different colours and sizes to indicate the different members,

The distances between the planets should be clearly drawn. Also note that ......我们可以用不同的颜色、大小表示不同的成员,应该把行星间的距离画清楚。还要注意……

1. Mercury水星

2. Venus金星

3.Earth 地球

4. Mars火星

5. Jupiter木星

6. Saturn 土星